Rear lights out!

All rear lights except fog, direction and brake lights do not work! Front markers and parks is OK. My Chilton do not cover chassis electric on my 93 cherokee, so I do not know where to look first. I have checked out fuses, they seem to be the same front/rear. Does anyone have an idea where to look for this fault?

Try downloading this diagram:
http://www.lp2aenergy.com/PDF/93XJ/

Try downloading this diagram:
http://www.lp2aenergy.com/PDF/93XJ/

Thanks, that helped me out. I could not find the faulthy point, but replaced the actual wire.

BB.